How do environmental factors interact with genetic predisposition?

Environmental factors play a crucial role in influencing gene expression, which is why the chosen answer is accurate. Gene expression can be significantly affected by various environmental influences such as diet, exposure to toxins, stress, and lifestyle choices. For example, an individual with a genetic predisposition for a certain condition may not develop that condition if they maintain a healthy lifestyle or avoid specific environmental triggers. This interaction suggests a dynamic relationship where the environment can either enhance or suppress the expression of genes associated with health or disease.

In contrast, other options do not align with the complexities of gene-environment interactions. For instance, if environmental factors had no effect on gene expression, it would imply a purely deterministic view of genetics, neglecting the nuanced interplay between genes and the environment. Similarly, while environmental factors might amplify genetic risk in some scenarios, it doesn't encapsulate the entire picture, which includes the possibility of mitigating genetic predispositions. Lastly, stating that environmental factors solely determine disease outcomes undermines the significant role that genetics can play, suggesting a more integrated approach is necessary to understand health outcomes.